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DRUG CLASS:

PKCβ inhibitor

30d
PKCβ inhibitor MS-553 displays preclinical efficacy in both treatment-naïve and BTK inhibitor-resistant Chronic Lymphocytic Leukemia. (PubMed, Blood Cancer Discov)
MS-553 reduced BCR and Wnt/β-catenin signaling, overcame stromal cell mediated protection, and synergized with venetoclax in CLL samples. Furthermore, MS-553 delayed disease progression and prolonged survival in the Eµ-MTCP1 murine model of CLL. Collectively our results demonstrate that selective inhibition of PKCβ has the potential to overcome BTKi-resistant CLL.
Preclinical • Journal
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PRKCB (Protein Kinase C Beta)
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Venclexta (venetoclax) • MS-553
2ms
Leveraging Medulloblastoma Clonal Dynamics to Overcome Treatment Resistance. (PubMed, Clin Cancer Res)
This work provides the foundation for clinical validation of small-molecule inhibitors synergistic with PTC-596 to improve the durability of remissions and extend survival of patients with treatment-refractory Group 3 MB.
Journal
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PLK1 (Polo Like Kinase 1) • BMI1 (BMI1 proto-oncogene, polycomb ring finger)
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unesbulin (BMIi-1) • Kinenza (enzastaurin)
2ms
MS-553 in Diabetic Retinopathy Patients With Central Involved Macular Edema (clinicaltrials.gov)
P1, N=45, Recruiting, Shenzhen MingSight Relin Pharmaceuticals Co., Ltd. | Trial completion date: Jul 2025 --> Dec 2026 | Trial primary completion date: Jun 2025 --> Oct 2026
Trial completion date • Trial primary completion date
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MS-553
2ms
A Phase Ib Study of the Selective PKC-β Inhibitor MS-553 in Patients With Refractory or Relapsed CLL/SLL (clinicaltrials.gov)
P1/2, N=12, Not yet recruiting, MingSight Pharmaceuticals, Inc | Trial completion date: Dec 2027 --> Dec 2028 | Initiation date: Jul 2025 --> Jul 2026 | Trial primary completion date: Sep 2027 --> Sep 2028
Trial completion date • Trial initiation date • Trial primary completion date
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MS-553
6ms
An MHC-Related Gene's Signature Predicts Prognosis and Immune Microenvironment Infiltration in Glioblastoma. (PubMed, Int J Mol Sci)
We further propose I-BET-762 and Enzastaurin as potential therapeutic candidates for glioma. In conclusion, the four-gene signature we identified and the corresponding risk score model constructed from it provide valuable tools for the prognosis prediction of glioblastoma multiforme (GBM) and may guide personalized treatment strategies. The least absolute shrinkage and selection operator (LASSO) risk score has demonstrated significant prognostic evaluation utility in clinical GBM patients, bringing potential implications for patient stratification and the optimization of treatment regimens.
Journal
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TNFRSF9 (TNF Receptor Superfamily Member 9) • FCGR2B (Fc Fragment Of IgG Receptor IIb) • TNFSF14 (TNF Superfamily Member 14)
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Kinenza (enzastaurin) • molibresib (GSK525762)
7ms
New P1/2 trial
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MS-553
8ms
MS-553 in Diabetic Retinopathy Patients With Central Involved Macular Edema (clinicaltrials.gov)
P1, N=45, Recruiting, Shenzhen MingSight Relin Pharmaceuticals Co., Ltd. | Suspended --> Recruiting
Enrollment open
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MS-553
9ms
Targeting PKC as a Therapeutic Strategy to Overcome Chemoresistance in TNBC by Restoring Aurora Kinase B Expression. (PubMed, J Cell Mol Med)
By taking advantage of a library screening with various kinase inhibitors, we found that the small-molecule inhibitor enzastaurin targeting protein kinase C (PKC) could overcome resistance in TNBC cells. Moreover, the efficiency of dual treatment was largely determined by AURKB, implying that AURKB could be a potential predictive marker for stratifying patients who may benefit from the combinatorial treatment. Collectively, our study not only unravels a novel underlying mechanism for paclitaxel resistance in TNBC but also provides a new potential combinatorial therapeutic strategy in the clinic.
Journal
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AURKB (Aurora Kinase B)
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paclitaxel • Kinenza (enzastaurin)
1year
Epoxytiglianes induce keratinocyte wound healing responses via classical protein kinase C activation to promote skin re-epithelialization. (PubMed, Biochem Pharmacol)
The prototype epoxytigliane, EBC-46 (tigilanol tiglate), is a potent anti-cancer agent in clinical development for local treatment of a range of human and animal tumors...PKC-βI/-βII isoform inhibition by enzastaurin (1 μM), significantly inhibited HaCaT proliferation and wound repopulation responses induced by both epoxytiglianes, especially at 1.51-151 nM. PKC-α inhibitor, Ro 31-8220 mesylate (10 nM), exerted lesser inhibitory effects on HaCaT responses...Phospho-PKC (p-PKC) studies confirmed that epoxytiglianes transiently activated classical PKC isoforms (p-PKCα, p-PKC-βI/-βII, p-PKCγ) in a dose- and time-dependent manner. By identifying how epoxytiglianes stimulate classical PKCs to facilitate keratinocyte healing responses and re-epithelialization, these findings support further epoxytigliane development as topical therapeutics for clinical situations involving impaired re-epithelialization, such as non-healing wounds in skin.
Journal
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KRT17 (Keratin 17) • CDKN1A (Cyclin-dependent kinase inhibitor 1A) • MMP1 (Matrix metallopeptidase 1) • PRKCB (Protein Kinase C Beta) • CCNB1 (Cyclin B1) • MMP7 (Matrix metallopeptidase 7)
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Kinenza (enzastaurin) • bisindolylmaleimide IX (RO-31-8220) • tigilanol tiglate (EBC-46)
over1year
Randomized Study Using SM-030 Gel for Adults With Melasma (clinicaltrials.gov)
P2, N=138, Recruiting, DermBiont, Inc. | Trial completion date: Jul 2025 --> Oct 2025 | Trial primary completion date: Jan 2025 --> Apr 2025
Trial completion date • Trial primary completion date
over1year
A Study of MS-553 in Patients With Relapsed or Refractory B-cell Lymphoma (clinicaltrials.gov)
P1/2, N=8, Terminated, MingSight Pharmaceuticals, Inc | N=38 --> 8 | Trial completion date: Jul 2026 --> Nov 2023 | Recruiting --> Terminated | Trial primary completion date: Apr 2026 --> Nov 2023; The study is terminated due to major protocol revisions.
Enrollment change • Trial completion date • Trial termination • Trial primary completion date
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MS-553
over1year
MS-553 in Diabetic Retinopathy Patients With Central Involved Macular Edema (clinicaltrials.gov)
P1, N=45, Suspended, Shenzhen MingSight Relin Pharmaceuticals Co., Ltd. | Trial completion date: Jan 2024 --> Jul 2025 | Recruiting --> Suspended | Trial primary completion date: Dec 2023 --> Jun 2025
Trial completion date • Trial suspension • Trial primary completion date
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MS-553